Academy Award winner Brie Larson is joining the Marvel Cinematic Universe in 2019?s Captain Marvel, which casts her as Carol Danvers, the titular cosmic hero who has been both a member and ally of the Avengers in the Marvel Comics continuity. Expected to make her debut as the character in the still-untitled fourth Avengers movie, Larson was glimpsed on the Atlanta set of the film in what appears to be her Captain Marvel uniform.